almucantar

[al-myoo-kan-ter]

al·mu·can·tar

[al-myoo-kan-ter]
noun Astronomy.
a circle on the celestial sphere parallel to the horizon; the locus of all points of a given altitude.


Origin:
1350–1400; probably < Medieval Latin almucantarath < Arabic al-muqanṭarāt the almucantars, equivalent to al the + muquanṭarāt sundial, derivative of qanṭarah arch; replacing almicanter, Middle English almicanteras (plural) < Middle French almicantarath < Medieval Latin
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Almucantar is always a great word to know.
So is Aquarius. Does it mean:
a natural body that revolves around a planet such as a moon
the Water Bearer, a zodiacal constellation between Pisces and Capricornus
Collins
World English Dictionary
almucantar or almacantar (ˌælməˈkæntə)
 
n
1.  a circle on the celestial sphere parallel to the horizontal plane
2.  an instrument for measuring altitudes
 
[C14: from French, from Arabic almukantarāt sundial]
 
almacantar or almacantar
 
n
 
[C14: from French, from Arabic almukantarāt sundial]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Britannica
Encyclopedia

almucantar

in astronomy, any circle of the celestial sphere parallel to the horizon; when two objects are on the same almucantar, they have the same altitude. The term also refers to instruments of a pattern invented by the U.S. astronomer Seth Carlo Chandler for determining latitude or time by observing the times of transit of stars across a fixed almucantar.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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